CN106705931A - Method, device and system for automatically obtaining azimuth angle of base station antenna - Google Patents

Abstract

The present invention provides a method, device and system for automatically obtaining the azimuth angle of the base station antenna, wherein the method for automatically obtaining the azimuth angle of the base station antenna includes: collecting two first signal indicators on the preset reference direction and two signal devices on the base station antenna. The data information of the second annunciator obtains the distance between each of the two first annunciators and the two second annunciators; calculates the angle between the base station antenna and the preset reference direction according to the distance Obtaining the pre-stored azimuth of the preset reference direction, and calculating the azimuth of the base station antenna according to the azimuth and the included angle of the preset reference direction. The solution provided by the present invention can make the measurement process of the base station antenna azimuth angle simpler, less interfered in the measurement process, higher in precision of the measured azimuth angle, and lower in measurement cost.

Description

A method, device and system for automatically obtaining the azimuth angle of a base station antenna

technical field

The present invention relates to the field of wireless technology, in particular to a method, device and system for automatically acquiring the azimuth angle of a base station antenna.

Background technique

In the mobile communication system, the engineering parameters of the base station antenna directly affect the coverage direction and range of the wireless signal, which is an important basis for network optimization. The industrial parameters of the base station antenna mainly include azimuth, downtilt and hanging height. Because base station antennas are generally directional antennas, the azimuth angle directly determines the main coverage direction of the antenna. Accurate measurement of the azimuth angle of the antenna is very important to ensure network coverage.

At present, the azimuth angle measurement of the base station antenna generally adopts the following means:

Existing Solution 1: Measuring with a compass

On-site measurement through hand-held tools is a common way of measuring industrial parameters at present, and it is generally carried out by tower workers or network optimization personnel through a compass. When measuring, stand with the hand tool in the normal direction of the antenna, keep the eye, the compass and the antenna in a straight line, and determine the azimuth of the antenna according to the position indicated by the compass. This method has the advantages of low cost and simple operation.

However, it is necessary to coordinate the tower workers to go up the station or climb the tower, and there are problems such as personnel and property coordination, and the cost is high; the experience and quality of the operators have a great influence on the test results, and manual errors will be introduced; the compass needle works when the external magnetic field is strong (such as a magnetized iron tower) is susceptible to interference, resulting in inaccurate readings.

Existing scheme 2: measure by electronic instrument

On-site measurement through electronic instruments can be regarded as an upgraded version of the compass measurement method. The most common one on the market is the antenna attitude indicator. The antenna attitude indicator has built-in multiple sensors such as electronic compass, acceleration sensor and GPS. When measuring, you only need to stick the fuselage on the antenna to obtain the azimuth, downtilt and longitude and latitude information at one time. Compared with traditional mechanical tools such as compass and spirit level, the use of electronic instruments is fast and can avoid errors introduced by manual readings. Many antenna attitude instruments also have the function of data return, which can directly report the measurement data to the background.

However, it is still necessary to go to the station or climb the tower during the measurement, and it also needs to coordinate personnel and property, etc.; the magnetic sensor in the electronic instrument will still receive interference when the external magnetic field is strong, resulting in a large reading deviation. While calibration can remove some of the bias, it is difficult to guarantee accurate compensation for disturbances.

Existing Solution 3: Measurement by Dual GPS Antennas

At present, this method is relatively seldom used, and patents such as CN 102509902A can be referred to. The dual GPS antenna direction finding system is mainly composed of two GPS antennas, a receiver and a data processing unit. In the above-mentioned patent solution, the baseline formed by connecting two GPS antennas is in a predetermined positional relationship with the antenna, and the azimuth angle of the antenna is determined by the direction of the baseline. Dual GPS antenna direction finding uses carrier phase observation value for relative positioning, high positioning accuracy, strong anti-interference, and is often used in precision geodetic survey and precision engineering survey.

However, the dual-antenna GPS direction finding is measured by the carrier phase method, which puts forward higher requirements on the GPS receiver used, and requires a receiver and antenna with high timing accuracy and accurate phase measurement. Generally, GPS receivers are divided into three types: navigation type, terrain measurement type and timing type type. When the accuracy is improved, the cost of equipment is also doubled. Compared with the first two schemes, the cost of measuring with dual GPS antennas is obviously higher.

In addition, in this measurement scheme, the connection line of the two antennas, that is, the length of the baseline has an important influence on the measurement result. Generally, the longer the baseline, the higher the accuracy of the measurement. For example, a certain professional GPS direction-finding instrument on the market has measurement accuracy of 0.25 degrees, 0.15 degrees and 0.1 degrees (both average values) at baseline lengths of 0.5 meters, 1 meter and 2 meters. The width of the base station antenna is generally about 20 to 30 cm. In order to be installed on the antenna for measurement, the length of the baseline will not exceed the width of the antenna. This limits the measurement accuracy of the scheme to some extent.

Contents of the invention

The purpose of the present invention is to provide a method, device and system for automatically obtaining the azimuth angle of the base station antenna, so as to solve the problem of low accuracy of the azimuth angle of the base station antenna measured in the prior art.

In order to solve the above technical problems, an embodiment of the present invention provides a method for automatically obtaining the azimuth angle of a base station antenna, including:

Obtain the distance between each of the two first annunciators and the two second annunciators by collecting data information of the two first annunciators in the preset reference direction and the two second annunciators on the base station antenna;

calculating an angle between the base station antenna and a preset reference direction according to the distance;

Acquiring the pre-stored azimuth of the preset reference direction, and calculating the azimuth of the base station antenna according to the azimuth and the included angle of the preset reference direction.

Optionally, before the collection of data information of two first annunciators in a preset reference direction and two second annunciators on a base station antenna, the method further includes:

The azimuth of the preset reference direction is obtained by measuring and pre-stored.

Optionally, the step of calculating the angle between the base station antenna and a preset reference direction according to the distance includes:

Projecting the connection line between the two second annunciators to the plane where the two first annunciators are located, the original plane where the two second annunciators are located is parallel to the horizontal plane where the two first annunciators are located;

Processing the projected connection between the two second signal devices and the connection between the two first signal devices, and constructing a right triangle in combination with the distance for calculation to obtain a projected plane angle as the base station The angle between the antenna and the preset reference direction.

Optionally, the step of calculating the azimuth angle of the base station antenna according to the azimuth angle and the included angle of the preset reference direction includes:

The azimuth angle of the base station antenna is obtained by summing the azimuth angle of the preset reference direction and the included angle.

Optionally, the first annunciator is a signal transmitter, and the second annunciator is a signal receiver, or both the first annunciator and the second annunciator are distance sensors.

The present invention also provides a device for automatically obtaining the azimuth angle of the base station antenna, comprising:

The first processing module is configured to obtain the azimuth of the preset reference direction and the two first signal transmitters in the preset reference direction by collecting data information of the two first signal transmitters in the preset reference direction and the two second signal transmitters on the base station antenna. the distance between the annunciator and the two second annunciators each;

A calculation module, configured to calculate an angle between the base station antenna and a preset reference direction according to the distance;

The second processing module is configured to obtain the pre-stored azimuth of the preset reference direction, and calculate the azimuth of the base station antenna according to the azimuth and the included angle of the preset reference direction.

Optionally, the device also includes:

The third processing module is configured to measure and pre-store the azimuth of the preset reference direction before the first processing module executes the operation.

Optionally, the calculation module includes:

The projection sub-module is used to project the connection line between the two second annunciators to the plane where the two first annunciators are located, and the original plane where the two second annunciators are located is at the same level as the two first annunciators. parallel to each other;

The processing sub-module is used to process the projected connection between the two second signal devices and the connection between the two first signal devices, and combine the distance to construct a right triangle for calculation to obtain the projected plane clip angle, which is an angle between the base station antenna and a preset reference direction.

Optionally, the second processing module includes:

The summation submodule is configured to sum the azimuth angle of the preset reference direction and the included angle to obtain the azimuth angle of the base station antenna.

Optionally, the first annunciator is a signal transmitter, and the second annunciator is a signal receiver, or both the first annunciator and the second annunciator are distance sensors.

The present invention also provides a system for automatically obtaining the azimuth angle of the base station antenna, which includes: the above-mentioned device for automatically obtaining the azimuth angle of the base station antenna, and also includes two first annunciators and two second annunciators.

The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

In the above solution, the method for automatically obtaining the azimuth angle of the base station antenna obtains the two first signal devices and the two data information of the two first signal devices on the base station antenna by collecting the data information of the two first signal devices in the preset reference direction and the two second signal devices on the base station antenna. The distance between each of the two second annunciators; then calculate the angle between the base station antenna and the preset reference direction according to the distance; then obtain the azimuth of the pre-stored preset reference direction, and calculate the angle according to the preset reference direction The azimuth angle of the base station antenna and the included angle are calculated to obtain the azimuth angle of the base station antenna; the measurement process of the azimuth angle of the base station antenna is simpler, the measurement process is less disturbed, the measured azimuth angle is more accurate, and the measurement cost is lower.

Description of drawings

FIG. 1 is a schematic flow diagram of a method for automatically obtaining the azimuth angle of a base station antenna according to Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the definition of the azimuth angle of the antenna according to Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of a broadside direction of a base station antenna according to Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of a reference direction in Embodiment 2 of the present invention;

5 is a schematic diagram of the relationship between the base station antenna broadside and the reference direction according to Embodiment 2 of the present invention;

6 is a schematic diagram of a plane where the base station antenna broadside projection reference direction is located in Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of the relationship between the base station antenna broadside projected on the plane where the reference direction is located and the reference direction according to Embodiment 2 of the present invention;

8 is a schematic structural diagram of a device for automatically obtaining the azimuth angle of a base station antenna according to Embodiment 3 of the present invention;

9 is a schematic diagram of a system architecture for partially automatically obtaining the azimuth angle of a base station antenna according to Embodiment 4 of the present invention;

FIG. 10 is a schematic diagram of data information transmission of the system for automatically obtaining the azimuth angle of a base station antenna according to Embodiment 4 of the present invention.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

Aiming at the problem of low accuracy of base station antenna azimuth angle measurement in the prior art, the present invention provides various solutions, specifically as follows.

Embodiment one

As shown in Figure 1, the method for automatically obtaining the azimuth angle of the base station antenna provided by Embodiment 1 of the present invention includes:

Step 11: By collecting the data information of the two first annunciators in the preset reference direction and the two second annunciators on the base station antenna, the distance between the two first annunciators and the two second annunciators is obtained. distance;

Step 12: Calculate an angle between the base station antenna and a preset reference direction according to the distance;

Step 13: Obtain the pre-stored azimuth of the preset reference direction, and calculate the azimuth of the base station antenna according to the azimuth and the included angle of the preset reference direction.

Wherein, the data information of the first annunciator may include the distance between the two first annunciators and the time point when the signal is transmitted to the second annunciator, and the data information of the second annunciator may include the distance between the two second annunciators The distance between them and the time point of receiving the signal from each first annunciator, but the present invention is not limited thereto.

In Embodiment 1 of the present invention, by collecting the data information of two first annunciators in the preset reference direction and two second annunciators on the base station antenna, each of the two first annunciators and the two second annunciators is obtained Then calculate the angle between the base station antenna and the preset reference direction according to the distance; then obtain the azimuth of the pre-stored preset reference direction, and calculate the base station according to the azimuth and angle of the preset reference direction The azimuth angle of the antenna: the measurement process of the azimuth angle of the base station antenna is simpler, the interference in the measurement process is less, the accuracy of the measured azimuth angle is higher, and the measurement cost is lower.

Further, before collecting the data information of the two first annunciators on the preset reference direction and the two second annunciators on the base station antenna, the method further includes: measuring and obtaining the azimuth of the preset reference direction corner, and pre-store.

Among them, the azimuth of the preset reference direction can be measured by existing well-known instruments or tools, such as the dual GPS measurement solution in the technical solution, which is a very high-precision solution when the baseline is not limited. There is also a tool of , which can be used to measure the azimuth of the preset reference direction.

Specifically, the step of calculating the angle between the base station antenna and the preset reference direction according to the distance includes: projecting the line between the two second annunciators to where the two first annunciators are located The plane where the two second annunciators are located is parallel to the horizontal plane where the two first annunciators are located; the connection between the projected two second annunciators and the connection between the two first annunciators Lines are processed, and combined with the distance to construct a right triangle for calculation to obtain the projected plane angle, which is used as the angle between the base station antenna and the preset reference direction.

Correspondingly, the step of calculating the azimuth of the base station antenna according to the azimuth and the included angle of the preset reference direction includes: summing the azimuth of the preset reference direction and the included angle to obtain the The azimuth angle of the base station antenna.

Optionally, the first annunciator is a signal transmitter, and the second annunciator is a signal receiver, or both the first annunciator and the second annunciator are distance sensors.

In summary, the solution provided by Embodiment 1 of the present invention has the following advantages over the prior art:

1. It is only necessary to measure the azimuth of the preset reference direction once on a base station (for example, if the preset reference direction is set on the host, then it is enough to measure the azimuth of the preset reference direction once when the host is installed), other The base station antenna obtains the azimuth angle through the preset reference direction; the tool for measuring the azimuth angle of the preset reference direction can be used unlimited times, and it does not need to be included in the azimuth measurement cost of each antenna;

2. More importantly, the base station antenna is often adjusted, but the preset reference direction will not change. No matter how the base station antenna is adjusted, the adjusted antenna azimuth angle can be obtained through this solution. This process no longer requires manual on-site ; This is significantly different from using tools to measure the azimuth angle of the antenna on site every time, which saves manpower and material resources, and improves the efficiency and accuracy of the measurement.

Embodiment two

It can be known from the prior art that low-cost magnetic sensors measure azimuth angles are susceptible to interference, and solutions with higher accuracy have higher costs. For this reason, Embodiment 2 of the present invention proposes a method for automatically obtaining the azimuth angle of a base station antenna.

A base station often needs to install more than 3 pairs of antennas. If it is a multi-system system, the number of antennas will increase exponentially. If a reference direction can be firstly defined on the base station, the azimuth angle of the antenna itself can be obtained only by measuring the angle between each antenna and the reference direction, which will be described in detail below.

Selection of reference direction

Select a reference direction on the base station and obtain its azimuth angle, convert the measurement of the azimuth angle of the base station antenna into the calculation of the angle between the base station antenna and the reference direction, and further convert it into distance measurement, so as to obtain the azimuth angle of the base station antenna. Among them, the reference direction is a fixed horizontal direction, which can be the installation direction of the host mentioned below. When selecting, try to choose a high place without occlusion, so that the sensors are not occluded, so as to improve the accuracy of measurement , for example, in the scene of the base station on the roof, it can be selected as a high wall edge; in the environment of the iron tower, the direction of the host mentioned below can also be defined as the reference direction. Its azimuth can be obtained by one-time measurement with professional tools. After the reference direction is selected, it will not change with the antenna adjustment, and it is a fixed and known direction.

The specific solution process is as follows:

Take two position points A and B in the broadside direction of the base station antenna, and the direction of the vertical line connecting AB in the horizontal plane is the azimuth angle of the antenna (the definition of the azimuth angle of the antenna is shown in Figure 2 and Figure 3) . As shown in Figure 4, take two position points C and D in the known reference direction, and the line connecting CD is the reference direction. Since the wide side of the antenna is always horizontal during installation, the reference direction is also horizontal (the antenna must be kept horizontal during installation, and the situation that one side is high and the other side is low cannot appear crooked, that is, the roll angle should be 0 as much as possible, and the reference direction should also be horizontal. Just choose to be horizontal, and this is easy to do), so the line segments AB and CD are parallel to the horizontal plane, these four points form a tetrahedron, and when point A and point B are projected to the horizontal plane where CD is located, the vertical The lines are of equal height, both h. AB and CD have lengths x and y. Meanwhile, the lengths of the line segments AC, AD, BC, and BD are a, b, c, and d, respectively, as shown in FIG. 5 .

Project AB to the horizontal plane where CD is located. Let the projection points of A and B be A' and B' respectively, and the lengths of line segments A'C, A'D, B'C and B'D are a' and b' respectively ,c',d'; the intersection of A'B' and CD (or its extension) is E. Since AB is horizontal, the lengths of AA' and BB' are equal, which is defined as h; in addition, it can be seen that the length of A'B' is the same as AB, which is still x. In the projected horizontal plane, draw vertical lines from A' and B' to CD, which are respectively A'A" and B'B", and their lengths are divided into e and f. The lengths of B"C and A"D are j and k, respectively. As shown in Figure 6 and Figure 7, there are the following relationships:

(y+jk) ² +(e+f) ² ＝x ²

f ² +j ² =c' ² =c ² -h ²

f ² +(j+y) ² =d' ² =d ² -h ²

e ² +(yk) ² =a′ ² =a ² −h ²

e ² +k ² =b' ² =b ³ -h ²

In the above 5 equations, if a, b, c, d, x, y can all be obtained, and the unknown quantities are e, f, j, k, h, then the unknown quantities can be solved through the above equations. Then it can be seen that the angle θ between A’B’ and CD satisfies,

After solving θ, the azimuth angle of A'B' can also be obtained.

In summary, the solution of Embodiment 2 of the present invention is to take two points of known length in the reference direction of known azimuth angle, take two points of known length on the antenna along its wide side, and measure other points The length between the point and the point is calculated to obtain the azimuth angle of the antenna. That is, the problem of measuring the azimuth is transformed into the problem of finding the distance with a known reference direction. In a specific practice, two sensors (C and D) may be arranged at a fixed distance (y) in the reference direction. Two other sensors (A and B) are mounted on the base station antenna with a fixed distance (x) between the sensors and arranged along the broad side of the antenna. By measuring the distance (a, b, c, d) between the sensors, the azimuth angle of the antenna under test can be obtained.

Embodiment three

As shown in Figure 8, the device for automatically obtaining the azimuth angle of the base station antenna provided by Embodiment 3 of the present invention includes:

The first processing module 81 is configured to acquire the data information of the two first annunciators in the preset reference direction and the two second annunciators on the base station antenna, to obtain each of the two first annunciators and the two second annunciators the distance between the two;

A calculation module 82, configured to calculate an angle between the base station antenna and a preset reference direction according to the distance;

The second processing module 83 is configured to obtain the pre-stored azimuth of the preset reference direction, and calculate the azimuth of the base station antenna according to the azimuth and the included angle of the preset reference direction.

Wherein, the data information of the first annunciator may include the distance between the two first annunciators and the time point when the signal is transmitted to the second annunciator, and the data information of the second annunciator may include the distance between the two second annunciators The distance between them and the time point of receiving the signal from each first annunciator, but the present invention is not limited thereto.

In Embodiment 3 of the present invention, by collecting the data information of two first annunciators in the preset reference direction and two second annunciators on the base station antenna, each of the two first annunciators and the two second annunciators is obtained. Then calculate the angle between the base station antenna and the preset reference direction according to the distance; then obtain the azimuth of the pre-stored preset reference direction, and calculate the base station according to the azimuth and angle of the preset reference direction The azimuth angle of the antenna: the measurement process of the azimuth angle of the base station antenna is simpler, the interference in the measurement process is less, the accuracy of the measured azimuth angle is higher, and the measurement cost is lower.

Further, the device further includes: a third processing module, configured to measure and obtain the azimuth of the preset reference direction before the first processing module executes the operation, and pre-store it.

Among them, the azimuth of the preset reference direction can be measured by existing well-known instruments or tools, such as the dual GPS measurement solution in the technical solution, which is a very high-precision solution when the baseline is not limited. There is also a tool of , which can be used to measure the azimuth of the preset reference direction.

Specifically, the calculation module includes: a projection sub-module, configured to project the connection line between the two second annunciators to the plane where the two first annunciators are located, and the original plane where the two second annunciators are located Parallel to the horizontal plane where the two first annunciators are located; the processing submodule is used to process the projected connection between the two second annunciators and the connection between the two first annunciators, and combine the The distance is calculated by constructing a right triangle to obtain the projected plane angle, which is used as the angle between the base station antenna and the preset reference direction.

Correspondingly, the second processing module includes: a summation submodule, configured to sum the azimuth angle of the preset reference direction and the included angle to obtain the azimuth angle of the base station antenna.

Optionally, the first annunciator is a signal transmitter, and the second annunciator is a signal receiver, or both the first annunciator and the second annunciator are distance sensors.

Wherein, the implementation examples of the above-mentioned method for automatically obtaining the azimuth angle of the base station antenna are all applicable to the embodiment of the device for automatically obtaining the azimuth angle of the base station antenna, and can also achieve the same technical effect.

In summary, the solution provided by Embodiment 3 of the present invention has the following advantages over the prior art:

1. It is only necessary to measure the azimuth of the preset reference direction once on a base station (for example, if the preset reference direction is set on the host, then it is enough to measure the azimuth of the preset reference direction once when the host is installed), other The base station antenna obtains the azimuth angle through the preset reference direction; the tool for measuring the azimuth angle of the preset reference direction can be used unlimited times, and it does not need to be included in the azimuth measurement cost of each antenna;

2. More importantly, the base station antenna is often adjusted, but the preset reference direction will not change. No matter how the base station antenna is adjusted, the adjusted antenna azimuth angle can be obtained through this solution. This process no longer requires manual on-site ; This is significantly different from using tools to measure the azimuth angle of the antenna on site every time, which saves manpower and material resources, and improves the efficiency and accuracy of the measurement.

Embodiment Four

The system for automatically obtaining the azimuth angle of a base station antenna provided by Embodiment 4 of the present invention includes: the above-mentioned device for automatically obtaining the azimuth angle of a base station antenna, and further includes two first signal devices and two second signal devices.

The following is a specific application example of the system provided in Embodiment 4 of the present invention.

The system provided by Embodiment 4 of the present invention may include a host and several data acquisition units. The host is responsible for communicating with the data acquisition unit and the remote radio frequency module RRU and processing the data returned by the data acquisition unit. As shown in Figure 9, each data acquisition unit is composed of two sensors, which are arranged on a rectangular plate-shaped installation structure. The central line of the sensors is parallel to the long side of the plate, and the distance between the sensors is set to a fixed value. as a known quantity. The installation structure can be installed on the top of the base station antenna. The connection line of the two sensors is perpendicular to the azimuth angle of the antenna (still according to the definition of the azimuth angle). The azimuth angle of the base station antenna can be determined by measuring the connection direction of the sensors.

The installation structure can be connected to the AISG interface of the antenna through the AISG cable (it can also be connected to the AISG interface of the RRU device) to realize power supply. Among them, AISG is the abbreviation of the International Antenna Interface Standardization Organization, and AISG defines the communication between the antenna and the main equipment. Interface and protocol standards. In addition, the installation structure can also be considered to be powered by solar cells, so that it is no longer necessary to supply power through AISG cables.

As shown in Figure 9, the host includes a single-chip microcomputer, which is responsible for processing the distance data returned by the sensor, and calculating and obtaining the azimuth angle data of the antenna. At the same time, a reference direction (baseline) is also installed on the host computer. The reference direction is also composed of two transmitters (the transmitter can emit a ranging signal, and the distance between the transmitter and the sensor can be obtained after being received by the sensor; the distance between the transmitters can be measured), and the direction of its connection It can be measured and obtained as a known quantity input by a special measuring tool. The installation position of the host is relatively flexible, and generally it will not be adjusted after installation. As shown in Figure 10, the host is connected to the base station antenna or RRU through the AISG cable, and is powered by the AISG cable. At the same time, the data processed by the host can also be transmitted to the network management background through the AISG cable.

Here is another description of the sensors used in the system. The sensors used in this system are required to be able to measure the distance between two pairs more accurately. As an embodiment of the present invention, a sensor based on the DTOA method can be used here. The principle of this method is that the measuring point C transmits an RF signal and an ultrasonic signal at the same time from the transmitter, the measuring point A starts timing after receiving the RF signal, and after receiving the ultrasonic signal, the time difference obtained is multiplied by the propagation speed of the ultrasonic wave The distance between A and C is obtained (the time required for RF to propagate from point C to point A is ignored here, because its speed is the speed of light, which is much higher than the speed of ultrasonic waves). The measurement point can send the obtained distance data to the host computer for processing. The DTOA method is a well-known technology, and will not be repeated here.

The accuracy of distance measurement has an important influence on the measurement of azimuth. There are a lot of data discussing the accuracy of DTOA measurement, and it is believed that the temperature in the air has a great influence on the accuracy, because the propagation speed of ultrasonic waves is different at different temperatures. A simple calibration method is given here, which can avoid compensation and correction of temperature errors. The method is to install a sensor P similar to A at a known distance from the C sensor, and obtain the propagation speed of the ultrasonic wave by measuring the time between P and C, which is used to calculate the distance between other measurement points. In this way, the accuracy of distance measurement can be better guaranteed, and the calculation is simple and easy.

It can be known from the above that the system provided by Embodiment 4 of the present invention converts the azimuth measurement of all antennas on the same base station into the azimuth measurement of the reference direction and some distance measurements by selecting the reference direction. Since the reference direction is not affected by the antenna position during selection, it can be installed in a place with little interference, and the baseline length in the reference direction is not limited by the size of the antenna, so it is easier to obtain the azimuth of the reference direction. In the case that the reference direction can be fixed (in fact, it can be basically fixed, and there is no need for adjustment compared with the antenna), at this time, the azimuth angle can only be measured once for the reference direction.

In addition, when the azimuth angle of the reference direction is known, the azimuth measurement of all antennas of the same base station is converted into the distance measurement between the measurement points. Since the distance measurement scheme will not be disturbed by the magnetic field, it does not depend on Thanks to high-precision GPS positioning, the cost of sensors can be effectively controlled. When it is necessary to add an antenna, it is only necessary to add two distance sensors and corresponding transmissions to the new antenna.

Wherein, the implementation embodiments of the above-mentioned device for automatically obtaining the azimuth angle of the base station antenna are all applicable to the embodiment of the system for automatically obtaining the azimuth angle of the base station antenna, and can also achieve the same technical effect.

It should be noted that many of the functional components described in this specification are referred to as modules/submodules, in order to more particularly emphasize the independence of their implementation.

In the embodiments of the present invention, the modules/submodules may be implemented by software so as to be executed by various types of processors. An identified module of executable code may, by way of example, comprise one or more physical or logical blocks of computer instructions which may, for example, be structured as an object, procedure, or function. Notwithstanding, the executable code of an identified module need not be physically located together, but may include distinct instructions stored in different bits which, when logically combined, constitute the module and implement the specified Purpose.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs and across multiple memory devices. Likewise, operational data may be identified within modules, and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed in different locations (including on different storage devices), and may exist, at least in part, only as electronic signals on a system or network.

When the module can be realized by software, considering the level of the existing hardware technology, the module that can be realized by software, regardless of the cost, those skilled in the art can build the corresponding hardware circuit to realize the corresponding function. The hardware circuit includes conventional very large scale integration (VLSI) circuits or gate arrays as well as existing semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

What has been described above is a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can also be made without departing from the principle of the present invention. These improvements and modifications should also be considered as Be the protection scope of the present invention.

Claims (11)

1. A method for automatically obtaining base station antenna azimuth, characterized in that, comprising: Obtain the distance between each of the two first annunciators and the two second annunciators by collecting data information of the two first annunciators in the preset reference direction and the two second annunciators on the base station antenna; calculating an angle between the base station antenna and a preset reference direction according to the distance; Acquiring the pre-stored azimuth of the preset reference direction, and calculating the azimuth of the base station antenna according to the azimuth and the included angle of the preset reference direction. 2. The method according to claim 1, characterized in that, before the data information of the two first annunciators on the preset reference direction and the two second annunciators on the base station antenna are collected, the method further include: The azimuth of the preset reference direction is obtained by measuring and pre-stored. 3. The method according to claim 1, wherein the step of calculating the angle between the base station antenna and a preset reference direction according to the distance comprises: Projecting the connection line between the two second annunciators to the plane where the two first annunciators are located, the original plane where the two second annunciators are located is parallel to the horizontal plane where the two first annunciators are located; Processing the projected connection between the two second signal devices and the connection between the two first signal devices, and constructing a right triangle in combination with the distance for calculation to obtain a projected plane angle as the base station The angle between the antenna and the preset reference direction. 4. The method according to claim 3, wherein the step of calculating the azimuth angle of the base station antenna according to the azimuth angle and the included angle of the preset reference direction comprises: The azimuth angle of the base station antenna is obtained by summing the azimuth angle of the preset reference direction and the included angle. 5. The method according to claim 1, wherein the first annunciator is a signal transmitter, the second annunciator is a signal receiver, or both the first annunciator and the second annunciator are distance sensors . 6. A device for automatically obtaining the azimuth angle of a base station antenna, characterized in that it comprises: The first processing module is used to obtain the two first signal devices and the two second signal devices every two by collecting the data information of the two first signal devices in the preset reference direction and the two second signal devices on the base station antenna. the distance between A calculation module, configured to calculate an angle between the base station antenna and a preset reference direction according to the distance; The second processing module is configured to obtain the pre-stored azimuth of the preset reference direction, and calculate the azimuth of the base station antenna according to the azimuth and the included angle of the preset reference direction. 7. The device of claim 6, further comprising: The third processing module is configured to measure and pre-store the azimuth of the preset reference direction before the first processing module executes the operation. 8. The device according to claim 6, wherein the calculation module comprises: The projection sub-module is used to project the connection line between the two second annunciators to the plane where the two first annunciators are located, and the original plane where the two second annunciators are located is at the same level as the two first annunciators. parallel to each other; The processing sub-module is used to process the projected connection between the two second signal devices and the connection between the two first signal devices, and combine the distance to construct a right triangle for calculation to obtain the projected plane clip angle, which is an angle between the base station antenna and a preset reference direction. 9. The device according to claim 8, wherein the second processing module comprises: The summation submodule is configured to sum the azimuth angle of the preset reference direction and the included angle to obtain the azimuth angle of the base station antenna. 10. The device according to claim 6, wherein the first annunciator is a signal transmitter, the second annunciator is a signal receiver, or both the first annunciator and the second annunciator are distance sensors . 11. A system for automatically obtaining the azimuth angle of the base station antenna, characterized in that it comprises: the device for automatically obtaining the azimuth angle of the base station antenna as claimed in any one of claims 6 to 10, and also includes two first annunciators and two a second annunciator.